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121593961 = 71224121
BaseRepresentation
bin1110011111101…
…10000001101001
322110210121120001
413033312001221
5222112001321
620022103001
73004350226
oct717660151
9273717501
10121593961
1162700385
123487aa61
131c2645b8
141221294d
15aa1cc91
hex73f6069

121593961 has 6 divisors (see below), whose sum is σ = 123335786. Its totient is φ = 119876400.

The previous prime is 121593959. The next prime is 121593971. The reversal of 121593961 is 169395121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 93238336 + 28355625 = 9656^2 + 5325^2 .

It is not a de Polignac number, because 121593961 - 21 = 121593959 is a prime.

It is a super-3 number, since 3×1215939613 (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121593961.

It is not an unprimeable number, because it can be changed into a prime (121593971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7020 + ... + 17101.

Almost surely, 2121593961 is an apocalyptic number.

It is an amenable number.

121593961 is a deficient number, since it is larger than the sum of its proper divisors (1741825).

121593961 is an frugal number, since it uses more digits than its factorization.

121593961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24263 (or 24192 counting only the distinct ones).

The product of its digits is 14580, while the sum is 37.

The square root of 121593961 is about 11026.9651763302. The cubic root of 121593961 is about 495.4167303151.

The spelling of 121593961 in words is "one hundred twenty-one million, five hundred ninety-three thousand, nine hundred sixty-one".

Divisors: 1 71 5041 24121 1712591 121593961